Google really did unveil its extremely popular Gmail service on April 1, way back in 2004, so you might be excused for getting excited over its brand new update, Gmail Blue. (Watch the video above.) But the tech world, and Google in particular, is also very fond of celebrating April Fool's Day. Twitter, for example, has unveiled its vowel-less service (for all non-paying tweeters), throwing in the letter Y:

We're doing this because we believe that by eliminating vowels, we'll encourage a more efficient and "dense" form of communication. We also see an opportunity to diversify our revenue stream. [Twitter]

Plausible, sure, but "some people flipped out about the new compose screen becoming the default, so they'd lose their mind if Google changed all of the colors," says TechCrunch's Olanoff. "I can't help but wonder if this is a not-so-subtle poke at Facebook," which uses blue liberally. But poking rivals or not, there are enough hilarious buzzwords — and one great cameo by a certain comedy troupe — to make Monday just slightly less blue.